<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>01-翻转世界</title>
</head>

<body>
    <!-- 字符串取反赋予回去 -->
    <div id="app">
        <h4>{{ str }}</h4>
        <button @click="reverse">逆转世界</button>
    </div>

    <script src="../vue.js"></script>
    <script>
        const app = new Vue({
            el: '#app',
            data: {
                str : 'Hello, World'
            },
            methods: {
                reverse() {
                    this.str = this.str.split('').reverse().join('');
                }
            }
        })
    </script>
</body>

</html>